Chin. Phys. B
Citation Search Quick Search

ISSN 1674-1056 (Print)
CN 11-5639/O4
About
   » About CPB
   » Editorial Board
   » SCI IF
   » Staff
   » Contact
Browse CPB
   » In Press
   » Current Issue
   » Earlier Issues
   » View by Fields
   » Top Downloaded
   » Sci Top Cited
Authors
   » Submit an Article
   » Manuscript Tracking
   » Call for Papers
   » Scope
   » Instruction for Authors
   » Copyright Agreement
   » Templates
   » Author FAQs
   » PACS
Referees
   » Review Policy
   » Referee Login
   » Referee FAQs
   » Editor in Chief Login
   » Editor Login
   » Office Login
Links
   »
HighLights More»   
Chin. Phys. B  
  Chin. Phys. B--1997, Vol.6, No.10
Select | Export to EndNote
GENERAL

TWO-DIMENSIONAL GRAVITATION AND NONSTATIONARY HIGGS FIELD SOLITONS

TAO BI-XIU
Acta Phys. Sin. (Overseas Edition), 1997, 6 (10): 721-724 doi: 10.1088/1004-423X/6/10/001
Full Text: [PDF 83 KB] (Downloads:335)
Show Abstract
Some aspects of two-dimensional gravity coupled to nonstationary Higgs field solitons are examined.General properties of the nonstationary Higgs field model in flat space-time and their generalization to curved space-time are discussed.A solution which corresponds to cosmology is arrived at.
CLASSICAL AREAS OF PHENOMENOLOGY

REFLECTION AND TRANSMISSION CHARACTERISTICS OF PLANE WAVES AT THE INTERFACE INCLUDING CHIRAL MEDIA

LI ZHAN-JIE, XIONG YUAN-SHENG, LIU ZU LI, YAO KAI-LUN
Acta Phys. Sin. (Overseas Edition), 1997, 6 (10): 731-736 doi: 10.1088/1004-423X/6/10/003
Full Text: [PDF 162 KB] (Downloads:354)
Show Abstract
The reflection from and transmission characteristic of the plane waves are studied at the interface between media including chiral media. The co-polarized and cross-polarized reflection and transmission coefficients are derived from the chiral constitutive relations. Possible values of chirality admittance ζc are determined for fixed Brewster angles. In addition, the features of reflection and transmission in some typical cases including the normal inci dence case and that containing a mirror-conjugated medium are discussed in detail. For example, complex chiral parameters for minimal reflection coefficient in the case of normal incidence are optimized.

THE DISENTANGLED-STATE IN THE TWO-PHOTON JAYNES-CUMMING MODEL WITH A KERR-LIKE MEDIUM

WEI WEI, GUO GUANG-CAN
Acta Phys. Sin. (Overseas Edition), 1997, 6 (10): 737-745 doi: 10.1088/1004-423X/6/10/004
Full Text: [PDF 237 KB] (Downloads:373)
Show Abstract
The pure state dynamical evolution of the atomic as well as the field states in the two-photon Jaynes Cumming model with a Kerr-like medium for the field initially in the coherent state is investigated under the high-field approximation (\bar{n}>>1). Analytic expressions of the disentanglement conditions and the relevant disentangled states are derived, which are closely related to Kerr nonlinear coupling constant. This study also reveals that the initial atomic excited state can be evolved into the atomic dipole squeezed state.
ATOMIC AND MOLECULAR PHYSICS

(2+2)RESONANCE ENHANCED MULTIPHOTON IONIZATION-FRAGMENTATION STUDY OF DIMETHYLAMINE

WEI JIE, FANG LI, ZHANG BING, GUO WEN-YUE, ZHANG LIAN-DI, ZHANG SHU-DONG, CAI JI-YE
Acta Phys. Sin. (Overseas Edition), 1997, 6 (10): 725-730 doi: 10.1088/1004-423X/6/10/002
Full Text: [PDF 161 KB] (Downloads:280)
Show Abstract
The multiphoton ionization spectra of dimethylamine are given in the 445-470 nm region. A time of flight mass spectrometer was used,and experiment was done under collision free condition. It is found that (2+2) resonance enhanced multiphoton ionization through (nN,3s) Rydberg state produces parent ions which endure pseudo-α and C—N bond cleavages. The former forms CH3N+H=CH2 ions,and the latter gives CH2=N+H2 ions .
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES

HEAVY ION TRACK DIAMETERS IN MICA STUDIED WITH SCANNING FORCE MICROSCOPE

WANG YU-GANG, ZHAO WEI-JIANG, J.ACKERMANN, A.MLLER, R.NEUMANN
Acta Phys. Sin. (Overseas Edition), 1997, 6 (10): 746-751 doi: 10.1088/1004-423X/6/10/005
Full Text: [PDF 179 KB] (Downloads:405)
Show Abstract
In the present study, the scanning force microscope (SFM) was employed to measure the heavy ion track diameters in mica and was operated in the lateral-force mode with different loading forces. The mica samples were irradiated with Se, Au, Pb and Zn ions with a kinetic energy of 11.4 MeV/u at the UNILAC of GSI. The measured average track diameter increased slowly with increasing loading force between the SFM tip and sample. The experimental data pointed out that the track diameter versus loading force could be fitted by a linear function both for Se and Au ion species and the slopes of the fitted lines were nearly the same. By extrapolating to zero loading force, the intrinsic diameters of the ion tracks were obtained. A possible mechanism for the observations was discussed.

INFLUENCE OF RELATIVE DENSITY AND PARTICLE SIZE ON THE SPECIFIC HEAT OF NANOCRYSTALLINE IRON

TONG XIAO-SHU, JIN DUO, BAI HAI-YANG, LUO JIAN-LIN, WANG WEN-KUI
Acta Phys. Sin. (Overseas Edition), 1997, 6 (10): 752-757 doi: 10.1088/1004-423X/6/10/006
Full Text: [PDF 220 KB] (Downloads:313)
Show Abstract
The specific heats of two nanocrystalline iron samples with different structures have been measured in the temperature range from 2 to 26 K. Experimental results show that the specific heat of nanocrystalline iron samples exhibits abnormal characteristic compared with that of standard bulk iron. The contributions of quantum size effect, surface mode and Einstein mode have been observed in the measurement. Through analyses, it is discovered that the relative density and particle size have a great influence on specific heat of nanocrystalline iron at low temperature.
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

CONCISE POLARON MODEL TO THE CALCULATION OF BINDING ENERGY IN SOME STRONG-AND WEAK-COUPLING POLAR CRYSTALS

WANG YI, WANG KE-LIN, CHEN CHUAN-YU, HUANG XIAO-WU
Acta Phys. Sin. (Overseas Edition), 1997, 6 (10): 758-763 doi: 10.1088/1004-423X/6/10/007
Full Text: [PDF 155 KB] (Downloads:273)
Show Abstract
A new concise polaron model is proposed to study the ground state of polarons in some strong-and weak-coupling polar crystals. The ground state energy and binding energy of these materials are calculated numerically by iteration method. Results are in close agreement with the experimental data.

ANNIHILATION OF VERTICAL-BLOCH-LINE CHAINS IN THE WALLS OF ORDINARY HARD BUBBLES SUBJECTED TO JOINT STATIC BIAS FIELD AND IN-PLANE FIELD

WANG YUAN-FEI, HAN BAO-SHAN, TANG GUI-DE, WANG HONG-XIN, NIE XIANG-FU
Acta Phys. Sin. (Overseas Edition), 1997, 6 (10): 764-770 doi: 10.1088/1004-423X/6/10/008
Full Text: [PDF 221 KB] (Downloads:350)
Show Abstract
For the ordinary hard bubbles(OHBs) of garnet bubble films, the annihilation of the vertical-Bloch line (VBL) chains in their walls subjected to joint static bias field Hb and in plane field Hip was experimentally studied. The curves of two critical in-plane fields, H(1)ip and H′ip, vs Hb were measured. By means of the so-called "head-cut" and "tail-cut" experiments designed in this work, it was verified that for the OHBs subjected to Hip, their VBL chains with different lengths lose VBLs and become shorter simultaneously. It was also verified that the critical in-plane fields H(1)ipand H′ip correspond to the break down of the shortest and longest VBL chains of OHBs, respectively.
Copyright © the Chinese Physical Society
Address: Institute of Physics, Chinese Academy of Sciences, P. O. Box 603,Beijing 100190 China(100190)
Tel: 010-82649026   Fax: 010-82649027   E-Mail: cpb@aphy.iphy.ac.cn
Supported by Beijing Magtech Co. Ltd. Tel: 86-010-62662699 E-mail: support@magtech.com.cn